--- title: "Solitek SOLID Bifacial 425 W Solar Panel: Specs & Datasheet | ComparePV" description: "Solitek SOLID Bifacial 425 W solar panel. Specs: 21.76% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/ginlong-solis-solid-bifacial-425-w" image: "https://comparepv.com/og/panel/ginlong-solis-solid-bifacial-425-w.png" updated: 2026-09-11 --- # Solitek SOLID Bifacial 425 W Middle of its segment, heavy for its output 1,220 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Solitek - **Model:** SOLID Bifacial 425 W - **Series:** SOLID series Bifacial Anti-Glare - **Rated power:** 425 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 400-450 W (1220 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 425 W | 435 W | Typical | | | Module efficiency | 21.76% | 22.00% | Typical | 7,349 | | Power density | 217.6 | 220.2 | Typical | 7,235 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,152 | | Weight (kg) | 33.0 kg | 22.0 kg | Weak - bottom 2% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.76% | 22.00% | Typical | 7,349 | | Power density | 217.6 | 220.2 | Typical | 7,235 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,152 | | Weight per kWp | 77.6 | 51.5 | Weak - bottom 2% | 13,802 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **77.6 kg per kWp** - Bottom 2% of the TOPCon 400-450 W segment, against a median of 51.5. Ranked 13,802nd in the whole database. - **Best for:** Residential, commercial and BIPV. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 425 W - **Efficiency:** 21.76 % - **Voltage at Pmax (Vmp):** 32.57 V - **Current at Pmax (Imp):** 13.05 A - **Open-circuit voltage (Voc):** 38.65 V - **Short-circuit current (Isc):** 13.70 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.300 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC - **NOCT:** 46 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 108 - **Bifacial:** yes ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 40 mm - **Weight:** 33.0 kg - **Area:** 1.95 m2 - **Power density:** 217.6 Wp/m2 ### Warranty and degradation - **Product warranty:** 30 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 90.0 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.31 % - **Output after 30 years:** 383 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7349 of 14129 | | Power density | 7235 of 14129 | | Temperature coefficient | 6152 of 14129 | | Weight | 13802 of 14129 | | Warranty | 21 of 14129 | ## About this series The **SOLID Bifacial Anti-Glare** series from SoliTek is a unique solution for installations that require both high aesthetics and environmental safety. A key innovation is the **Satin glass with a special surface structure**, which reduces light reflection to below 3600 cd/m², while standard panels achieve over 10,000 cd/m². Importantly, this effect is achieved without additional coatings or films - solely through the processing of the glass itself, which ensures the long-term durability of the anti-glare properties. This makes the modules the ideal choice for installations on roads, airports, hiking trails, public buildings, and historic sites, where blinding reflections could pose a hazard or cause discomfort to the surroundings. The **TOPCon n-type bifacial** technology allows for energy generation from both sides of the panel, increasing output even in diffuse light conditions. The **glass-glass** construction provides exceptional mechanical strength, IP68 sealing, fire class A certification, and resistance to ammonia and salt fog. The series is available in aesthetically pleasing full-black versions - both framed and frameless - making it a flexible solution for roof and facade installations. The entire product is covered by a **30-year product and performance warranty**. ## Notable figures - At 21.8% efficiency, this panel is on par with typical \*\*TOPCon 400-450W\*\* modules - At 217.6 W/m² power density, roof space requirements are typical for \*\*TOPCon 400-450W\*\* panels - At -0.30%/°C, hot weather performance is typical for \*\*TOPCon 400-450W\*\* panels - At 33.0 kg, this panel is 11.0 kg heavier than the \*\*TOPCon 400-450W\*\* median (22.0 kg) - more demanding for installation crews - #7349 for efficiency, #6152 for temperature performance out of 14129 panels ## Questions ### What makes the SoliTek SOLID Bifacial Anti-Glare different from standard solar panels in terms of glare reduction? The SoliTek SOLID Bifacial Anti-Glare series uses SATIN glass with a specially structured surface that reduces reflected luminance to below 3,600 cd/m², compared to over 10,000 cd/m² for standard panels. Crucially, this is achieved without any additional coatings or films - solely through glass processing - which ensures the anti-glare properties remain effective for the full 30-year service life without degradation. ### Can SoliTek SOLID Bifacial Anti-Glare 425W panels be installed on both pitched rooftops and building facades? Yes. The series is available in framed variants (35 mm and 40 mm aluminum frame) and a frameless version, all in a full-black aesthetic. Frameless modules are well-suited for facade and BIPV applications, while framed versions work on pitched and flat rooftops. The glass-glass construction with IP68-rated junction box and Fire Class A certification meets the requirements for public buildings and listed heritage sites. ### What warranty does SoliTek offer on the SOLID Bifacial Anti-Glare series? SoliTek provides a 30-year product warranty and a 30-year power output warranty on the SOLID Bifacial Anti-Glare series. This covers both physical defects and guaranteed performance retention, making it one of the longest combined warranties available in the European market - many competitors offer only 25-year terms. ### Does bifacial TOPCon technology deliver real gains in Central European climates with frequent cloud cover? Yes. N-type TOPCon cells perform especially well under diffuse irradiance, which dominates in Central Europe during autumn and winter. The low temperature coefficient of Pmax at -0.300%/°C minimizes summer power losses, while the bifacial design captures albedo-reflected light from the rear side. In typical Central European conditions, the bifacial gain is estimated at 5-15% depending on ground albedo and tilt angle. ### How heavy is the SoliTek SOLID Bifacial Anti-Glare 425W module and do standard roof structures handle the load? The module weighs approximately 33 kg due to the dual 3.2 mm glass-glass construction - noticeably heavier than glass-backsheet panels at around 20-22 kg. A structural assessment of the roof or mounting surface is advisable before installation. In return, the glass-glass build delivers snow load resistance up to 10,500 Pa, wind load resistance up to 4,500 Pa, and certified ammonia and salt mist resistance for harsh environments. ### Where are SoliTek SOLID Bifacial Anti-Glare panels manufactured and what certifications do they carry? SoliTek is a Lithuanian manufacturer based in Vilnius, producing modules within the European Union - which eliminates import tariff risk and shortens the supply chain. The panels carry Fire Class A certification, IP68-rated junction box, ammonia resistance, and salt mist resistance certifications. SoliTek is also among the few European PV manufacturers holding the Cradle to Cradle certification, verifying responsible materials management. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/aeb8ab5f567e073c2b1ddd80.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Maxeon SPR-MAX7-475](https://comparepv.com/panel/maxeon-spr-max7-475) | 475 W | Lighter, +2.2 pp, +10 yr warranty | | [Just Solar JST-EDMH-(445-465)W-TD (465W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-465w-class) | 465 W | +40 W, lighter, +2.0 pp | | [JA Solar JAT54S40-475/LR](https://comparepv.com/panel/ja-solar-jat54s40-475-lr) | 475 W | +50 W, lighter, +2.0 pp | | [Tongwei TWMNH-48HW475](https://comparepv.com/panel/tongwei-solar-twmnh-48hw475) | 475 W | +50 W, lighter, +2.0 pp | | [Astronergy CHSM48RN(DG)/F-BH-475](https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm48rn-dg-f-bh-475) | 475 W | +50 W, lighter, +2.0 pp | | [AIKO AIKO-A475-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a475-mce54mw) | 475 W | +50 W, lighter, +2.0 pp | | [AIKO AIKO-A475-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a475-mah54mw) | 475 W | +50 W, lighter, +2.0 pp | | [Solitek SOLID Agro 290](https://comparepv.com/panel/ginlong-solis-solid-agro-290) | 290 W | -135 W, lighter, -7.1 pp | | [Solitek SOLID Bifacial 425](https://comparepv.com/panel/ginlong-solis-solid-bifacial-425) | 425 W | Very close match | | [Solitek SOLID 435 Bifacial Transparent](https://comparepv.com/panel/ginlong-solis-solid-435-bifacial-transparent) | 435 W | +10 W, +0.5 pp | | [Solitek SOLID Bifacial Full black 435](https://comparepv.com/panel/solitek-solid-bifacial-full-black-435) | 435 W | +10 W, lighter, +0.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +85 W, lighter, +3.2 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +70 W, lighter, +3.0 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +80 W, lighter, +2.9 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | +80 W, lighter, +2.9 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +65 W, lighter, +2.7 pp | --- Source: https://comparepv.com/panel/ginlong-solis-solid-bifacial-425-w Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.